RCB.ino

int xpto = 0;
byte A = 1;
byte B = 2;
byte C = 3;
byte D = 4;
int valor = 0;
//--------------------------------------------------------
void setup()
{
  Serial.begin(115200);
}
//--------------------------------------------------------
void loop()
{
  valor = 0x4321;
  executa();

  valor = 0x3214;
  executa();
  Serial.println(" ");
}
//--------------------------------------------------------
void executa()
{
  for (int i = 1; i < 5; i++)
  {
    xpto = 0x000F & valor;
    valor = valor >> 4 ;

    switch (xpto)
    {
      case 1:
        Serial.println(A);
        digitalWrite(2, HIGH);
        delay(1000);
        digitalWrite(2, LOW);
        delay(1000);
        break;
      case 2:
        Serial.println(B);
        digitalWrite(3, HIGH);
        delay(1000);
        digitalWrite(3, LOW);
        delay(1000);
        break;
      case 3:
        Serial.println(C);
        digitalWrite(4, HIGH);
        delay(1000);
        digitalWrite(4, LOW);
        delay(1000);
        break;
      case 4:
        Serial.println(D);
        digitalWrite(5, HIGH);
        delay(1000);
        digitalWrite(5, LOW);
        delay(1000);
        break;
      default:
        break;
    }
  }
}